Year Percent 1995-01-01 12.210526315789400 1996-01-01 7.094711972760450 1997-01-01 3.555670905788100 1998-01-01 4.586466165413520 1999-01-01 7.538219398513930 2000-01-01 6.148543330248700 2001-01-01 2.627413142033340 2002-01-01 5.341015213774060 2003-01-01 5.980978140664730 2004-01-01 4.668466223698820 2005-01-01 6.925543038901580 2006-01-01 6.578572667838030 2007-01-01 12.304426418229000 2008-01-01 8.100462399579500 2009-01-01 2.913358428494700 2010-01-01 2.086666666666950 2011-01-01 4.977735637069710 2012-01-01 2.391935213123290 2013-01-01 1.901251818605850 2014-01-01 0.852630497539925 2015-01-01 -1.001734327763790 2016-01-01 0.836008061506297